Plate spring assembly and vehicle
By adopting a combination structure of straight rod bolts and limiting components, the problems of manufacturing difficulty and high manufacturing cost of leaf spring base are solved, achieving the effects of simplified assembly and cost reduction.
Patent Information
- Application Number
- CN202423316958.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In the existing technology, the connection between the leaf spring base and the U-bolt is a curved surface casting structure, which increases the manufacturing difficulty and cost.
The system employs a combination of straight bolts and limiting components. The limiting components prevent the straight bolts from rotating, while the nuts secure the leaf spring, leaf spring seat, and pressure plate. This avoids the curved surface structure of the U-bolt and leaf spring seat, reduces installation size and angular errors, and simplifies the assembly process.
This reduces the processing complexity and manufacturing cost of leaf spring seats, reduces labor costs, improves assembly efficiency, and extends the service life of leaf spring assemblies.
Smart Images
Figure CN223508040U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle technology, and in particular to a leaf spring assembly and a vehicle using the leaf spring assembly. Background Technology
[0002] In a vehicle, leaf springs support the vehicle's weight through their elastic deformation and transfer forces from the wheels to the chassis. Leaf springs also absorb impacts from the road surface, providing a degree of flexibility to maintain a smooth ride.
[0003] In the related technology, the vehicle includes a leaf spring, a leaf spring pressure plate, and a leaf spring base. The leaf spring pressure plate and the leaf spring base are respectively located at the upper and lower ends of the leaf spring, and the leaf spring base is connected to the balance shaft. The leaf spring pressure plate, the leaf spring, and the leaf spring base are connected together by four U-bolts, with each pair of U-bolts located on the same side of the leaf spring base.
[0004] However, since the connection between the leaf spring base and the U-bolt is a curved casting structure, it increases the manufacturing difficulty of the leaf spring base, which in turn increases the manufacturing cost of the leaf spring base. Utility Model Content
[0005] This application provides a leaf spring assembly and a vehicle that can reduce the manufacturing difficulty of the leaf spring base, thereby reducing the manufacturing cost of the leaf spring base.
[0006] In a first aspect, this application provides a leaf spring assembly, including a leaf spring, a pressure plate, a leaf spring seat, a bolt assembly, and two limiting members. The pressure plate and the leaf spring seat are respectively disposed at opposite ends of the leaf spring, and the leaf spring seat has a central axis extending along the height direction of the leaf spring. The bolt assembly includes two bolt groups, which are symmetrically arranged about the central axis. Each bolt group includes two bolt units, which are respectively located on opposite sides of the leaf spring. Each bolt unit includes at least two spaced straight bolts. The two limiting members are arranged one-to-one with the two bolt groups. The bolt shanks of the straight bolts pass through the limiting members, the leaf spring seat, and the pressure plate in sequence and are connected to the corresponding nuts, thereby fastening the limiting members, the leaf spring seat, the leaf spring, and the pressure plate together. The limiting members are used to prevent the straight bolts from rotating, and a weight-reducing hole is provided in the middle of the limiting members.
[0007] As an optional implementation, the limiting member includes a main body and multiple limiting parts; the main body abuts against the leaf spring seat, the main body allows the bolt rod to pass through, and the center of the weight reduction hole coincides with the center of the main body; multiple limiting parts are connected to the end of the main body away from the leaf spring seat, and the multiple limiting parts are provided one-to-one with multiple straight bolts in a bolt group, with the limiting parts abutting against the periphery of the bolt head of the corresponding straight bolt.
[0008] As an optional implementation, the limiting part has a limiting surface, which is arranged parallel to one of the peripheral sidewalls of the bolt head and stops against the peripheral sidewall.
[0009] As an optional implementation, the body includes a connecting plate and a protrusion, the connecting plate through which the bolt rod passes; the protrusion is connected to one end of the connecting plate away from the leaf spring seat, and a plurality of limiting parts are provided at one end of the protrusion away from the connecting plate; wherein, the weight reduction hole includes a first hole section and a second hole section that are connected, the first hole section being formed on the connecting plate and the second hole section being formed on the protrusion.
[0010] As an optional implementation, the limiting part has a first surface and a second surface disposed opposite to each other, the first surface being connected to the protrusion; wherein the area of the first surface is larger than the area of the second surface.
[0011] As an optional implementation, a first weight-reducing groove is provided at the end of the connecting plate facing the leaf spring seat, and the first weight-reducing groove is connected to the first hole section.
[0012] As an optional implementation, the leaf spring seat includes a seat body and connecting portions connected to both sides of the seat body. The seat body has shaft holes formed for connecting with the balance shaft. The two connecting portions are provided in a one-to-one correspondence with two bolt groups. A limiting member abuts against the end of the connecting portion away from the leaf spring. The contour shape of the limiting member is adapted to the contour shape of the connecting portion.
[0013] As an optional implementation, the end of the connecting part away from the leaf spring is provided with two reinforcing protrusions, and the two reinforcing protrusions are provided in a one-to-one correspondence with the two bolt units; the limiting member abuts against the end of the reinforcing protrusion away from the connecting part.
[0014] As an optional implementation, a second weight-reducing groove is provided on the connecting part, and a reinforcing rib is provided on the groove wall of the second weight-reducing groove.
[0015] Secondly, this application provides a vehicle including a frame, a balance shaft, and the aforementioned leaf spring assembly; the balance shaft is connected to the frame, and the leaf spring seat is connected to the balance shaft.
[0016] In the leaf spring assembly and vehicle provided in this application, the limiting component, leaf spring seat, leaf spring, and pressure plate are fastened together by using straight bolts. Compared with the U-bolt solution in related technologies, this can reduce the error in the actual installation dimensions and installation angle after assembly. To a certain extent, it avoids the problem of stress concentration caused by the poor fit between the traditional U-bolt and the leaf spring seat, which leads to frequent breakage of the U-bolt. Moreover, it eliminates the need to set an arc surface structure on the leaf spring seat to mate with the U-bolt, thus reducing the processing complexity of the leaf spring seat and thereby reducing the manufacturing cost of the leaf spring seat.
[0017] Furthermore, by setting the limiting component, the rotation of the straight bolt can be restricted, and only the nut needs to be tightened during the assembly process. In this way, the assembly difficulty of the leaf spring assembly provided in this application can be reduced, and the labor cost required for the assembly of the leaf spring assembly can be reduced.
[0018] Furthermore, by providing weight-reducing holes on the limiting component, on the one hand, the use of raw materials for the limiting component can be reduced, thus reducing the manufacturing cost of the limiting component; on the other hand, the weight of the limiting component can be reduced, making it easier to assemble the leaf spring assembly provided in this application, thereby improving the assembly efficiency of the leaf spring assembly provided in this application. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the leaf spring assembly provided in the embodiments of this application;
[0020] Figure 2 for Figure 1 A schematic diagram of the planar structure along direction A;
[0021] Figure 3 An exploded view of a partial structure of the leaf spring assembly provided in the embodiments of this application;
[0022] Figure 4 A three-dimensional structural diagram of the limiting member in the leaf spring assembly provided in the embodiments of this application;
[0023] Figure 5 A three-dimensional structural schematic diagram of the limiting member in the leaf spring assembly provided in the embodiment of this application from another perspective;
[0024] Figure 6 This is a three-dimensional structural diagram of the leaf spring seat in the leaf spring assembly provided in the embodiments of this application.
[0025] Explanation of reference numerals in the attached figures:
[0026] 1. Leaf spring; 2. Pressure plate; 3. Leaf spring seat; 4. Straight bolt; 5. Nut; 6. Limiting component;
[0027] 10. Leaf spring assembly; 31. Seat body; 32. Connecting part; 33. Reinforcing protrusion; 34. Reinforcing part; 41. Bolt rod; 42. Bolt head; 61. Weight reduction hole; 62. Body part; 63. Limiting part;
[0028] 311, Shaft hole; 321, Second connecting hole; 322, Second weight-reducing groove; 323, Reinforcing rib; 611, First hole section; 612, Second hole section; 621, First connecting hole; 622, Connecting plate; 623, Protrusion; 631, Limiting surface; 632, Second surface;
[0029] 6221. First weight reduction tank. Detailed Implementation
[0030] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.
[0031] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
[0032] In related technologies, the vehicle includes a leaf spring, a leaf spring pressure plate, and a leaf spring base. The leaf spring pressure plate and leaf spring base are located at the upper and lower ends of the leaf spring, respectively, and the leaf spring base is connected to the balance shaft. The leaf spring pressure plate, leaf spring, and leaf spring base are connected together by four U-bolts, with every two U-bolts located on the same side of the leaf spring base. However, because the connection between the leaf spring base and the U-bolts is a curved casting structure, it increases the manufacturing difficulty of the leaf spring base, thereby increasing the manufacturing cost of the leaf spring base.
[0033] Therefore, the embodiments of this application provide a leaf spring assembly and a vehicle that can reduce the manufacturing difficulty of the leaf spring base, thereby reducing the manufacturing cost of the leaf spring base.
[0034] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific implementation details.
[0035] Please combine Figures 1 to 3 , Figure 1 This is a schematic diagram of the leaf spring assembly provided in the embodiments of this application. Figure 2 for Figure 1 A schematic diagram of the planar structure along direction A. Figure 3This is an exploded view of a partial structure of the leaf spring assembly provided in this application embodiment. As shown in the figure, this application embodiment provides a leaf spring assembly 10, including a leaf spring 1, a pressure plate 2, a leaf spring seat 3, a bolt assembly, and two limiting members 6. The pressure plate 2 and the leaf spring seat 3 are respectively disposed at opposite ends of the leaf spring 1. The leaf spring seat 3 has a central axis extending along the height direction of the leaf spring 1. The bolt assembly includes two bolt groups, which are symmetrically arranged about the central axis. Each bolt group includes two bolt units, which are respectively located on opposite sides of the leaf spring 1. Each bolt unit includes at least two spaced straight bolts 4. The two limiting members 6 are arranged one-to-one with the two bolt groups. The bolt shank 41 of the straight bolt 4 passes through the limiting member 6, the leaf spring seat 3, and the pressure plate 2 in sequence and is connected to the corresponding nut 5, fastening the limiting member 6, the leaf spring seat 3, the leaf spring 1, and the pressure plate 2 together. The limiting member 6 is used to prevent the straight bolt 4 from rotating, and a weight-reducing hole 61 is provided in the middle of the limiting member 6.
[0036] In this embodiment, the limiting member 6, leaf spring seat 3, leaf spring 1 and pressure plate 2 are fastened together by using straight bolts 4. Compared with the U-bolt scheme in related technologies, this can reduce the error in the actual assembly size and installation angle. To a certain extent, it avoids the problem of stress concentration caused by the non-tight fit between the traditional U-bolt and the leaf spring seat, which leads to frequent breakage of the U-bolt. Moreover, it does not require the setting of an arc surface structure on the leaf spring seat 3 to cooperate with the U-bolt. Thus, the processing complexity of the leaf spring seat 3 can be reduced, thereby reducing the manufacturing cost of the leaf spring seat 3.
[0037] Furthermore, by setting the limiting member 6, the rotation of the straight rod bolt 4 can be restricted. During the assembly process, only the nut 5 needs to be tightened. In this way, the assembly difficulty of the leaf spring assembly 10 provided in this embodiment can be reduced, and the labor cost required for the assembly of the leaf spring assembly 10 can be reduced.
[0038] Furthermore, by providing weight-reducing holes 61 on the limiting member 6, on the one hand, the use of raw materials for the limiting member 6 can be reduced, thus reducing the manufacturing cost of the limiting member 6; on the other hand, the weight of the limiting member 6 can be reduced, making it easier to assemble the leaf spring assembly 10 provided in this embodiment, thereby improving the assembly efficiency of the leaf spring assembly 10 provided in this embodiment.
[0039] Please continue to combine Figure 4 and Figure 5 , Figure 4 This is a three-dimensional structural diagram of the limiting member in the leaf spring assembly provided in the embodiments of this application. Figure 5This is a three-dimensional structural diagram of the limiting member in the leaf spring assembly provided in this application embodiment, viewed from another perspective. As shown, in some embodiments, the limiting member 6 includes a body portion 62 and a plurality of limiting portions 63; the body portion 62 abuts against the leaf spring seat 3, and the bolt rod 41 passes through the body portion 62. Specifically, the body portion 62 has a first connecting hole 621 through which the bolt rod 41 passes.
[0040] In order to facilitate the making of the weight reduction hole 61, in some optional embodiments, the center of the weight reduction hole 61 coincides with the center of the main body 62. In this way, the manufacturing difficulty of the limiting member 6 can be reduced.
[0041] Furthermore, multiple limiting parts 63 are connected to one end of the main body 62 away from the leaf spring seat 3, and each limiting part 63 is correspondingly provided with one of the multiple straight bolts 4 in a bolt group, with the limiting part 63 abutting against the periphery of the bolt head 42 of the corresponding straight bolt 4. In this way, through the cooperation between the limiting part 63 and the periphery of the bolt head 42, the rotation of the straight bolt 4 can be prevented to a certain extent, thereby improving the assembly efficiency of the leaf spring assembly 10 provided in this embodiment.
[0042] To achieve the limiting and stopping function of the limiting part 63 on the bolt head 42, in some optional embodiments, the limiting part 63 has a limiting surface 631, which is parallel to a peripheral sidewall of the bolt head 42 and stops against that sidewall. That is, the extending direction of the limiting surface 631 is consistent with the axial direction of the bolt shank 41. Thus, through the cooperation between the limiting surface 631 and the peripheral sidewall of the bolt head 42, the limiting part 63 can achieve the limiting and stopping function of the straight bolt 4.
[0043] To enhance the structural strength of the limiting member 6, in some optional embodiments, the main body 62 includes a connecting plate 622 and a protrusion 623. The connecting plate 622 allows the bolt rod 41 to pass through; the protrusion 623 is connected to the end of the connecting plate 622 facing away from the leaf spring seat 3, and multiple limiting parts 63 are disposed at the end of the protrusion 623 facing away from the connecting plate 622. Thus, the protrusion 623 enhances the structural strength of the limiting member 6, extends its service life, and consequently improves the service life of the leaf spring assembly 10 provided in this embodiment.
[0044] The weight reduction hole 61 includes a first hole section 611 and a second hole section 612 that are connected. The first hole section 611 is formed on the connecting plate 622, and the second hole section 612 is formed on the protrusion 623.
[0045] To reduce stress concentration in the limiting portion 63, in some embodiments, the limiting portion 63 has a first surface (not shown) and a second surface 632 disposed opposite to each other. The first surface is connected to the protrusion 623, and the limiting surface 631 is connected between the edge of the first surface and the corresponding edge of the second surface 632; wherein the area of the first surface is larger than the area of the second surface 632. In this way, the stress on the limiting portion 63 can be more evenly distributed, avoiding local stress concentration, thereby improving the strength of the limiting portion 63 and further improving the structural strength of the limiting member 6.
[0046] To avoid the limiting member 6 becoming too heavy due to the protrusion 623, in some embodiments, a first weight-reducing groove 6221 is provided at the end of the connecting plate 622 facing the leaf spring seat 3, and the first weight-reducing groove 6221 communicates with the first hole segment 611. This ensures the structural strength of the limiting member 6 while avoiding structural redundancy to a certain extent, thereby reducing the manufacturing cost of the limiting member 6.
[0047] Furthermore, please combine Figure 6 , Figure 6 This is a three-dimensional structural diagram of the leaf spring seat in the leaf spring assembly provided in this application embodiment. As shown in the figure, in some specific embodiments, the leaf spring seat 3 includes a seat body 31 and connecting portions 32 connected to both sides of the seat body 31. The seat body 31 has shaft holes 311 formed on it for connecting with the balance shaft. The two connecting portions 32 are correspondingly provided with two bolt groups. The limiting member 6 abuts against the end of the connecting portion 32 away from the leaf spring 1. Specifically, the connecting plate 622 abuts against the end of the connecting portion 32 away from the leaf spring 1. The contour shape of the limiting member 6 is adapted to the contour shape of the connecting portion 32, that is, the contour shape of the connecting plate 622 is adapted to the contour shape of the connecting portion 32. In this way, interference with the peripheral parts of the leaf spring assembly 10 due to the setting of the limiting member 6 can be avoided to a certain extent.
[0048] The connecting part 32 has a second connecting hole 321 through which the bolt rod 41 passes.
[0049] In some embodiments, to prevent the connecting part 32 from becoming structurally weak at the second connecting hole 321, two reinforcing protrusions 33 are provided at the end of the connecting part 32 away from the leaf spring 1, with each of the two reinforcing protrusions 33 corresponding to one of the two bolt units; the limiting member 6 abuts against the end of the reinforcing protrusion 33 away from the connecting part 32, wherein the second connecting hole 321 passes through the reinforcing protrusion 33 and the connecting part 32. Thus, by providing the reinforcing protrusions 33, the structural strength of the connecting part 32 can be improved, thereby further improving the structural strength of the leaf spring seat 3.
[0050] In order to balance the lightweight design and structural strength of the connection part, in some embodiments, the connection part 32 is provided with a second weight-reducing groove 322, and the groove wall of the second weight-reducing groove 322 is provided with a reinforcing rib 323.
[0051] To further enhance the structural strength of the leaf spring seat 3, a reinforcing part 34 is provided. The reinforcing part 34 is connected to the seat body 31 and the connecting part 32 on the side facing the leaf spring 1, and a portion of the second weight-reducing groove 322 is formed on the reinforcing part 34. In this way, the structural strength of the leaf spring seat 3 can be further enhanced, thereby extending the service life of the leaf spring seat 3 and, consequently, extending the service life of the leaf spring assembly 10 provided in this embodiment.
[0052] This embodiment also provides a vehicle, including a frame, a balance shaft, and the leaf spring assembly 10 described in the above embodiments. The balance shaft is connected to the frame, and the leaf spring seat 3 is connected to the balance shaft. The structure of the leaf spring assembly 10 has been described in detail in the above embodiments and will not be repeated here.
[0053] It should be noted that the balance shaft is used to balance the load between the middle axle and the rear axle of a vehicle to maintain vehicle stability. Further details about the balance shaft will not be provided here.
[0054] Furthermore, the vehicle provided in this embodiment should also include other components or modules that enable the vehicle to drive normally, without specific limitations.
[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A leaf spring assembly, characterized in that, include: Leaf spring; A pressure plate and a leaf spring seat are respectively disposed at opposite ends of the leaf spring, and the leaf spring seat has a central axis extending along the height direction of the leaf spring; A bolt assembly includes two bolt groups symmetrically arranged about the central axis. Each bolt group includes two bolt units located on opposite sides of the leaf spring. Each bolt unit includes at least two spaced straight bolts. Two limiting members are provided, and the two limiting members are correspondingly provided with the two bolt groups. The bolt shank of the straight bolt passes through the limiting member, the leaf spring seat and the pressure plate in sequence and is connected to the corresponding nut, thereby fastening the limiting member, the leaf spring seat, the leaf spring and the pressure plate together. The limiting member is used to prevent the straight bolt from rotating, and a weight-reducing hole is provided in the middle of the limiting member.
2. The leaf spring assembly according to claim 1, characterized in that, The limiting component includes a main body and multiple limiting parts; The main body abuts against the leaf spring seat, the main body allows the bolt rod to pass through, and the center of the weight reduction hole coincides with the center of the main body; Multiple limiting parts are connected to one end of the main body that is away from the leaf spring seat, and the multiple limiting parts are respectively provided with one-to-one correspondence with multiple straight bolts in a bolt group, and the limiting parts abut against the periphery of the bolt head of the corresponding straight bolt.
3. The leaf spring assembly according to claim 2, characterized in that, The limiting part has a limiting surface, which is arranged parallel to one of the peripheral sidewalls of the bolt head and stops against the peripheral sidewall.
4. The leaf spring assembly according to claim 2, characterized in that, The main body includes a connecting plate and a protrusion, the connecting plate through which the bolt rod passes; The protrusion is connected to the end of the connecting plate opposite to the leaf spring seat, and a plurality of the limiting portions are disposed at the end of the protrusion opposite to the connecting plate; The weight-reducing hole includes a first hole segment and a second hole segment that are connected. The first hole segment is formed on the connecting plate, and the second hole segment is formed on the protrusion.
5. The leaf spring assembly according to claim 4, characterized in that, The limiting part has a first surface and a second surface arranged opposite to each other, and the first surface is connected to the protrusion. The area of the first face is greater than the area of the second face.
6. The leaf spring assembly according to claim 4, characterized in that, The connecting plate has a first weight-reducing groove at one end facing the leaf spring seat, and the first weight-reducing groove is connected to the first hole section.
7. The leaf spring assembly according to any one of claims 1 to 6, characterized in that, The leaf spring seat includes a seat body and connecting portions connected to both sides of the seat body. The seat body has shaft holes for connecting with a balance shaft. The two connecting parts are provided in a one-to-one correspondence with the two bolt groups, and the limiting member abuts against the end of the connecting part away from the leaf spring; The contour shape of the limiting member is adapted to the contour shape of the connecting part.
8. The leaf spring assembly according to claim 7, characterized in that, The end of the connecting part opposite to the leaf spring is provided with two reinforcing protrusions, and the two reinforcing protrusions are provided one-to-one with the two bolt units; The limiting member abuts against the end of the reinforcing protrusion opposite to the connecting portion.
9. The leaf spring assembly according to claim 7, characterized in that, The connecting part is provided with a second weight-reducing groove, and the groove wall of the second weight-reducing groove is provided with reinforcing ribs.
10. A vehicle, characterized in that, Includes a frame, a balance shaft, and a leaf spring assembly as described in any one of claims 1 to 9; The balance shaft is connected to the vehicle frame, and the leaf spring seat is connected to the balance shaft.